Entreric diseases such as swine dysentery, proliferation enteropathy, epidemic diarrheoa, salmonellosis, and colibacillosi can commonly affect pork facilities, and have an economic impact. There are different ways to consider the economic cost of one of the diseases. Costs can be determined by the lost market opportunity, the cost of raising the pig until death, the lost breeding opportunity, feed conversion, additional costs due to reduced weight gain, increased variation in standard matrix weight contract, increased back-fat depth, or additional costs including feed additives and veterinary care. In the case of swine dysentery the economic cost is high, the feed conversion rises by 0.58, feed and facility costs increase 15% per kg, and medication can cost $2.5 per pig. Proliferative enteropathy decreases average daily gain 37-42%, which increases feed required per kg by 27-37%. The costs could be $6-7 per affected grower pig, but would depend on the facility and market weight agreements.